<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区 -->
        <el-row>
            <el-col>
                <el-button type="primary" @click="addRolesVisible=true">添加角色</el-button>
            </el-col>
        </el-row>

        <!-- 角色列表 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand" class="movelist">
              <template slot-scope="scope">
                <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                  <!-- 渲染一级权限 -->
                  <el-col :span="5">
                    <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染二级和三级权限 -->
                  <el-col :span="19">
                    <!-- 通过for循环 嵌套渲染二级权限 -->
                    <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                      <el-col :span="6">
                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag type="warning" v-for="(item3) in item2.children" :key="item3" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                      </el-col>
                    </el-row>
                  </el-col>
                </el-row>
                <!-- <pre>
                  {{scope.row}}
                </pre> -->
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showRoleDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog title="添加用户" :visible.sync="addRolesVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="90px">
      <el-form-item label="角色名称" prop="roleName">
        <el-input v-model="addForm.roleName"></el-input>
      </el-form-item>
      <el-form-item label="角色描述" prop="roleDesc">
        <el-input v-model="addForm.roleDesc"></el-input>
      </el-form-item>
      </el-form>
      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
       <!-- 修改角色对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="roleDialogVisible"
      width="30%" @close="roleDialogClosed">
      <el-form :model="roleForm" :rules="roleFormRules" ref="roleFormRef" label-width="90px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="roleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="roleForm.roleDesc"></el-input>
        </el-form-item>
        </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="roleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!--分配权限对话框 -->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%" @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
  </div>
</template>

<script>
export default {
    data() {
        return {
            // 所有角色列表信息
            rolelist: [],
            // 控制添加角色对话框的显示与隐藏
            addRolesVisible: false,
            // 添加角色的表单数据
            addForm: {
              roleName: '',
              roleDesc: ''
            },
            // 所有权限的数据
            rightslist:[],
            // 查询到角色信息对象
              roleForm: {},
              // 修改表单的验证规则对象
              roleFormRules: {
                roleName: [
                { required: true, message: '请输入角色名称', trigger: 'blur' },
                { min: 1, max: 10, message: '角色名称的长度在1~10个字符之间', trigger: 'blur' }
                ],
                roleDesc: [
                  { required: true, message: '请输入角色描述！', trigger: 'blur' },
                  { min: 2, max: 10, message: '角色描述的长度在2~10个字符之间', trigger: 'blur' }
                ]
              },
            // 添加表单的验证规则对象
            addFormRules: {
              roleName: [
                { required: true, message: '请输入角色名称', trigger: 'blur' },
                { min: 1, max: 10, message: '角色名称的长度在1~10个字符之间', trigger: 'blur' }
              ],
              roleDesc: [
                { required: true, message: '请输入角色描述', trigger: 'blur' },
                { min: 2, max: 10, message: '角色描述的长度在2~10个字符之间', trigger: 'blur' }
              ]
            },
            // 控制修改角色对话框的显示与隐藏
            roleDialogVisible: false,
            // 控制分配权限对话框显示与隐藏
            setRightDialogVisible: false,
            // 树形控件的属性绑定对象
            treeProps: {
              label: 'authName',
              children: 'children'
            },
            // 默认选中的节点id值数组
            defkeys: [],
            // 当前即将分配权限的角色id
            roleId: ''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        async getRolesList() {
           const { data: res } = await this.$http.get('roles')
           if (res.meta.status !== 200) {
               return this.$message.error('获取角色列表失败！')
           }
           this.rolelist = res.data
           // console.log(this.rolelist)
        },
        // 监听添加用户对话框的关闭事件
          addDialogClosed() {
            this.$refs.addFormRef.resetFields()
          },
          // 监听修改角色对话框的关闭事件
          roleDialogClosed() {
            this.$refs.roleFormRef.resetFields()
          },
        // 点击按钮添加新角色
        addRole() {
          this.$refs.addFormRef.validate(async valid => {
            if (!valid) return
            // 可以发起添加角色的网络请求
            const { data: res } = await this.$http.post('roles', this.addForm)
            if (res.meta.status !== 201) {
              this.$message.error('添加角色失败！')
            }
            this.$message.success('添加角色成功！')
            // 隐藏添加角色对话框
            this.addRolesVisible = false
            // 重新获取角色列表
            this.getRolesList()
          })
        },
        // 展示角色编辑对话框
        async showRoleDialog(id) {
          // console.log(id)
          const { data: res } = await this.$http.get('roles/' + id)
          if (res.meta.status !== 200) {
            return this.$message.error('查询用户信息失败！')
          }
          this.roleForm = res.data
          // 弹出修改页面参数
          this.roleDialogVisible = true
          // console.log(this.roleForm)
        },
        // 修改角色信息预验证
        editRoleInfo() {
        this.$refs.roleFormRef.validate(async valid => {
          if (!valid) return
          // 发起修改角色信息的数据请求
          const { data: res } = await this.$http.put('roles/' + this.roleForm.roleId, {
            roleName: this.roleForm.roleName,
            roleDesc: this.roleForm.roleDesc
          })
          // console.log(this.roleForm.roleId)
          if (res.meta.status !== 200) {
            return this.$message.error('更新用户信息成果失败！')
          }
          // 关闭对话框
          this.roleDialogVisible = false
          // 刷新数据列表
          this.getRolesList()
          // 提示修改成功
          return this.$message.success('更新用户信息成果成功！')
        })
      },
      // 根据Id删除对应的角色信息
      async removeRoleById(id) {
      // 询问角色是否删除
        const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning'
            }
          ).catch(err => err)
          // 如果用户确认则返回一个字符串confirm
          // 如果用户取消了删除，则返回值为字符串confirm
          // console.log(confirmResult)
          if (confirmResult !== 'confirm') {
            return this.$message.info('已经取消删除')
          }
          const { data: res } = await this.$http.delete('roles/' + id)
          if (res.meta.status !== 200) {
          return this.$message.error('删除角色失败！')
          }
          this.$message.success('删除角色成功！')
          this.getRolesList()
      },
      // 根据id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹框提示用户是否删除
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }

        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        // this.getRolesList()
        role.children = res.data
      },
      // 展示分配权限对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }
        // 获取到的权限数据保存到data中
        this.rightslist = res.data
        // console.log(this.rightslist)

        // 递归获取三级节点的id
        this.getLeafKeys(role, this.defkeys)
        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限的id,并保存在defKeys 数组中
      getLeafKeys(node, arr) {
        // 如果当前 node节点不包含children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }

        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defkeys = []
      },
      // 点击为角色分配权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }

        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
  margin-left: 47px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
